Oxygen and Hydrogen Isotope Studies of Igneous and Metamorphic Rocks and Associated Hydrothermal Alteration

首席研究员将开发一种新的稳定同位素质量 一种能测量各种气体氧同位素比的光谱仪 小样本。 在线分析微小硅酸盐的能力 和氧化物矿物样品，使用一种新的激光扫描仪， 技术，也将得到发展。 后者将导致 水相流体详细交换行为的研究 矿物和火山玻璃。 此外，研究将 在几个特定的裂谷带进行同位素变化 增强的裂缝渗透性允许深层 地表沃茨的循环。 调查还将采取 更好地了解地球化学同位素的地方。 陆壳和上地幔

The principal investigator will develop a new stable isotope mass spectrometer capable of measuring oxygen isotope ratios of very small samples. An on-line capability for analyzing tiny silicate and oxide mineral samples, using a new laser fluorination technique, also will be developed. The latter will lead to a study of detailed exchange behavior of aqueous fluids with minerals and volcanic glasses. Additionally, studies will be conducted on isotopic variations in several specific rift-zone environments where enhanced fracture permeability allows deep circulation of surface waters. Investigations also will take place to better understand the isotope geochemistry of the continental crust and upper mantle.